25469847457 has 8 divisors (see below), whose sum is σ = 26969477256. Its totient is φ = 23970373632.

The previous prime is 25469847443. The next prime is 25469847461. The reversal of 25469847457 is 75474896452.

It can be written as a sum of positive squares in 4 ways, for example, as 12311233936 + 13158613521 = 110956^2 + 114711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25469847457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25469847395 and 25469847404.

It is not an unprimeable number, because it can be changed into a prime (25469841457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561913 + ... + 605545.

It is an arithmetic number, because the mean of its divisors is an integer number (3371184657).

Almost surely, 2^25469847457 is an apocalyptic number.

It is an amenable number.

25469847457 is a deficient number, since it is larger than the sum of its proper divisors (1499629799).

25469847457 is a wasteful number, since it uses less digits than its factorization.

25469847457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77987.

The product of its digits is 67737600, while the sum is 61.

The spelling of 25469847457 in words is "twenty-five billion, four hundred sixty-nine million, eight hundred forty-seven thousand, four hundred fifty-seven".